Curb the Hapless

For each creature, flip a coin. Destroy each creature whose coin comes up tails.
The first blood moon is sure good luck,
At the second, the killers run amok.
The third represents a new birth,
But the fourth signals an end to all mirth.
And by the fifth, the Reaper's blade,
Has killed far more than the deadly nightshade.
-Keonji Folk Song